LAWYER PROFILE
Andrew Dufresne

Andrew Dufresne

USA 2026

Chambers ranking badge
Chambers ranking badge

Ranked in 1 practice area

About

Provided by Ashurst Perkins Coie – London, New York, Seattle, Sydney

USA

Practice Areas

Intellectual Property Law

Patent Litigation

Post-Grant Proceedings

Appeals, Issues & Strategy

Patent Appeals

Medical Device

Biotechnology & Pharmaceutical

Life Sciences & Healthcare

Career

Whether an anticipated dispute, ongoing litigation, or a new engagement on appeal, Andrew Dufresne helps clients protect and advance their interests in patent litigation at the appellate and trial levels. He regularly represents Fortune 100 and 500 companies, smaller and emerging businesses, universities, and several industry and trade groups. He earned a Ph.D. in molecular genetics and microbiology and brings firsthand technical knowledge and experience to matters involving the life sciences. His clients span various technology sectors, including pharmaceuticals, biotech, food science, electronics and computer software, and fitness and sports equipment.

Andy specializes in litigating before the U.S. Court of Appeals for the Federal Circuit, where he has successfully briefed and argued numerous patent cases and has extensive experience with appellate motions and mandamus practice. He also assists clients at the district court and agency levels with strategy, issue preservation, jury instructions, claim construction, dispositive motions, and post-trial briefing. In addition, he has participated in all phases of inter partes review proceedings before the Patent Trial and Appeal Board, including drafting petitions and other papers, conducting discovery, and presenting oral arguments.

In his active pro bono practice, Andy has successfully represented U.S. military veterans before the U.S. Court of Appeals for Veterans Claims and the Federal Circuit in cooperation with the Veterans Consortium Pro Bono Program. He has also served as court-appointed appellate counsel for defendants in criminal matters and worked with The Access Project in support of the Rising Scholars Network Clean Slate Program.

Chambers Review

Provided by Chambers

Chambers Guide to the USA

Intellectual Property: Litigation - Wisconsin

Band 3
Band 3

Individual Editorial

Andrew Dufresne has a high quality patent litigation practice. He is noted for his ability to represent multinational clients in federal courts for pre-trial patent infringement cases.

Strengths

Provided by Chambers

  • He is a wonderful young lawyer.

    Intellectual Property: LitigationChambers Guide to the USA
  • Andy is outstanding.

    Intellectual Property: LitigationChambers Guide to the USA

Ranked Individuals at Ashurst Perkins Coie – London, New York, Seattle, Sydney (218)

Alaska

Arizona

California

What success is built on

Chambers is the leading data and intelligence partner for the legal sector.

Explore thought leadership